Add unique RA/TA pair counting to test_monitor_tshark.sh

Display unique RA/TA pairs with frame counts, sorted by count (descending).
This helps identify which devices are communicating with each other and
the volume of traffic between each pair.

Co-authored-by: Cursor <cursoragent@cursor.com>

test_monitor_tshark.sh

@@ -211,6 +211,31 @@ if [ -n "$PACKET_LINES" ] && [ "$FINAL_COUNT" -gt 0 ]; then
             $1, ra, ta, type, subtype, radiotap
     }'
     echo ""
+    
+    # Count unique RA/TA pairs
+    echo "Unique RA/TA pairs (with counts):"
+    UNIQUE_PAIRS=$(echo "$PACKET_LINES" | awk -F'\t' '{
+        ra = ($3 != "" && $3 != "-") ? $3 : "N/A"
+        ta = ($4 != "" && $4 != "-") ? $4 : "N/A"
+        if (ra != "N/A" || ta != "N/A") {
+            pair = ra " -> " ta
+            count[pair]++
+        }
+    }
+    END {
+        for (pair in count) {
+            printf "%d\t%s\n", count[pair], pair
+        }
+    }' | sort -rn)
+    
+    if [ -n "$UNIQUE_PAIRS" ]; then
+        echo "$UNIQUE_PAIRS" | awk -F'\t' '{
+            printf "  %s: %d frame(s)\n", $2, $1
+        }'
+    else
+        echo "  (no valid RA/TA pairs found)"
+    fi
+    echo ""
 else
     echo "(No packets captured)"
     echo ""